Personnel locator
First Claim
Patent Images
1. A personnel locating system, comprising:
- a plurality of transmitter units adapted to be worn or carried by personnel whose locations are to be determined, each of said transmitter units adapted for transmitting signals having a common frequency during separate predetermined time intervals on a recurring basis;
a plurality of receiving means for mounting in rooms or areas to be monitored for locating the personnel, each of said receiving means operative to receive the signals transmitted by any of said transmitter units;
decoder means including time reference means and operative in response to signals received by said receiving means during said predetermined time intervals to produce signals indicative of the location of said transmitter units; and
display means connected to receive said location indicative signals and operative in response thereto to display the room or area locations of the personnel.
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Abstract
A personnel locator and display system for indicating on a status board the room numbers where designated key individuals are located at a given moment. Small portable transmitters, either ultrasonic or radio frequency, are worn by the key individuals, and receivers are provided in the rooms. The various transmitters emit pulses according to a preprogrammed timing sequence, and a decoding logic network connected to receive signals received in the rooms identifies the specific transmitter and room number and displays same on a status board. A programmer-recharger unit programs the pulse timing for each transmitter for identification of the wearer.
241 Citations
12 Claims
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1. A personnel locating system, comprising:
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a plurality of transmitter units adapted to be worn or carried by personnel whose locations are to be determined, each of said transmitter units adapted for transmitting signals having a common frequency during separate predetermined time intervals on a recurring basis; a plurality of receiving means for mounting in rooms or areas to be monitored for locating the personnel, each of said receiving means operative to receive the signals transmitted by any of said transmitter units; decoder means including time reference means and operative in response to signals received by said receiving means during said predetermined time intervals to produce signals indicative of the location of said transmitter units; and display means connected to receive said location indicative signals and operative in response thereto to display the room or area locations of the personnel. - View Dependent Claims (2, 3, 4, 10)
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5. A personnel locating system, comprising:
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a plurality of portable transmitter units for carrying or wearing by personnel to be monitored, each transmitter unit including a reference oscillator and gating means connected thereto to cause transmission of signals having a common frequency during recurring transmission intervals; a plurality of receivers for mounting in individual rooms or areas to be monitored, each of said receivers operative to receive the signals transmitted by any of said portable transmitter units while in individual rooms or areas; decoder means including a reference oscillator and means operatively connected thereto to define a plurality of sequential time intervals, and means responsive to said plurality of receivers to produce output signals indicative of the room or area and time interval in which a transmission is received; programming means connected to said time interval defining means and selectively connectable to individual transmitter units to program them for transmission of signals during individual intervals of said plurality of sequential time intervals; and display means connected to receive said output signals and operative in response thereto to display the room or area location of the personnel. - View Dependent Claims (6, 7, 8, 9, 11, 12)
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Specification